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Carbon dioxide as a pH-switch anti-solvent for biomass fractionation and pre-treatment with aqueous hydroxide solutions

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Abstract

Rice husks (or rice hulls) pre-treated with aqueous potassium hydroxide solutions showed excellent glucose yields during enzymatic saccharification. CO2 addition to the hydroxide solutions precipitated the dissolved rice husk silica as a nanoporous powder, while Ca(OH)2 addition regenerated the hydroxide solution and precipitated the dissolved lignin. Fractionation of the biomass was thus achieved using CO2 addition as a reversible pH-switch, and the hydroxide could be repeatedly recycled while maintaining biomass pre-treatment and fractionation efficacy.

Graphical abstract: Carbon dioxide as a pH-switch anti-solvent for biomass fractionation and pre-treatment with aqueous hydroxide solutions

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Publication details

The article was received on 23 Feb 2017, accepted on 13 Apr 2017 and first published on 17 Apr 2017


Article type: Communication
DOI: 10.1039/C7GC00574A
Citation: Green Chem., 2017, Advance Article
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    Carbon dioxide as a pH-switch anti-solvent for biomass fractionation and pre-treatment with aqueous hydroxide solutions

    T. Q. To, C. Kenny, S. Cheong and L. Aldous, Green Chem., 2017, Advance Article , DOI: 10.1039/C7GC00574A

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